Andreev bound state and multiple energy gaps in the noncentrosymmetric superconductor BiPd

Mintu Mondal, Bhanu Joshi, Sanjeev Kumar, Anand Kamlapure, Somesh Chandra Ganguli, Arumugam Thamizhavel, Sudhansu S. Mandal, Srinivasan Ramakrishnan*, Pratap Raychaudhuri

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

47 Citations (Scopus)

Abstract

We report directional point contact Andreev reflection (PCAR) measurements on high-quality single crystals of the noncentrosymmetric superconductor BiPd. The PCAR spectra measured on different crystallographic faces of the single crystal clearly show the presence of multiple superconducting energy gaps. For point contacts with low resistance, in addition to the superconducting gap feature, a pronounced zero-bias conductance peak is observed. These observations provide strong evidence for the presence of an unconventional order parameter in this material.

Original languageEnglish
Article number094520
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume86
Issue number9
DOIs
Publication statusPublished - 18 Sep 2012
MoE publication typeA1 Journal article-refereed

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